Developer tools, in your browser
Convert, encode, hash, and test. Nothing leaves this page.
Converters
JSON FormatterPrettify, minify and validate JSON.String To JSON ConverterTurn an escaped string into JSON, and back.CSV To JSON ConverterConvert CSV rows into JSON objects.JSON To CSV ConverterFlatten a JSON array into CSV.YAML To JSON ConverterConvert YAML documents into JSON.Markdown To HTML ConverterRender Markdown to HTML with a live preview.Cron Job To Human ReadableExplain a cron expression and preview its next runs.
Generation
Encode/Decode
Base64 Decode/EncodeEncode or decode UTF-8 text as Base64.JWT ToolDecode, verify and sign JSON Web Tokens.URL Encode/DecodePercent-encode or decode URL components.Hash GeneratorMD5, SHA-1, SHA-256 and SHA-512 digests at once.HTML Entity Decode/EncodeEscape special characters as HTML entities, or unescape them.ChecksumVerify a file or text against an expected checksum.HMAC GeneratorSign a message with a secret key using HMAC.
Testing/Utilities
Web Development
Runs locally in your browser